Sunan Abi Dawud 4918
سنن أبي داود#4918Hasanحَدَّثَنَا الرَّبِيعُ بْنُ سُلَيْمَانَ الْمُؤَذِّنُ، حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ سُلَيْمَانَ، - يَعْنِي ابْنَ بِلاَلٍ - عَنْ كَثِيرِ بْنِ زَيْدٍ، عَنِ الْوَلِيدِ بْنِ رَبَاحٍ، عَنْ أَبِي هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " الْمُؤْمِنُ مِرْآةُ الْمُؤْمِنِ وَالْمُؤْمِنُ أَخُو الْمُؤْمِنِ يَكُفُّ عَلَيْهِ ضَيْعَتَهُ وَيَحُوطُهُ مِنْ وَرَائِهِ " .
Narrated AbuHurayrah: The Prophet (ﷺ) said: The believer is the believer's mirror, and the believer is the believer's brother who guards him against loss and protects him when he is absent
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 43:146